I adopted Chin (short for Chinchilla) and Lacey when they were about three months old. Even though they look completely different they are biological sisters. Lacey is the braver, dominant sister, while Chin is calmer and more timid.
My Cage Specs:
C&C Cage, 2x5 or greater, Includes upper deck, Meet or exceed recommended sizes (see www.CavyCages.com)